Sash-lock.



No. 766,322. PATENTBD AUG. 2, 1904. J. M. BUTCHER.

SASH LOCK.

. APPLIGATION FILED JUNE 11,1903.

NO MODEL Aft t; 1 a; 4 24 542421 (7M Z. ZZZ/21, Xfl W 6 MM UNITED STATES Patented August 2, 1904.

PATENT OFFICE.

JAMES M. BUTCHER, OF ST. LOUIS, MISSOURI, ASSIGNOR OFFIFTY-ONE ONE-HUNDREDTHS TO MAX R. ORTHIVEIN, OF ST. LOUIS, MISSOURI.

SASH-LOCK- SPECIFICATION forming part of Letters Patent No. 766,322, dated August 2, 1904.

Application filed June 11 1903. Serial No. 160,964. (No model.)

To all whom/ it warty concern.-

Be it known that 1, JAMES M. BUTCHER, a

citizen of the United States, and a resident of the city of St. Louis and State of Missouri,have

invented a new and useful Sash-Lock, of which the following is a specification. I

My invention relates to sash-locks, and has for its principal object to produce a locking device of cheap and simple construction and of IO easy application and removal. It consists principally in a pawl pivotally mounted on a baseplate which is provided with a flange or offset portion arranged to overhang its support, and thereby retain the device in proper position.

5 It also consists in the arrangements and combinations of parts hereinafter set forth.

In the accompanying drawings, which form part of this specification, and wherein like symbols refer to like parts wherever they ocour, Figure 1 is a side View of a sash-lock embodying my invention, showing the sash-lock mounted upon the lower sash with its pawl arranged to bind against the upper sash. Fig. 2 is a detail view of the base-piece of the con- 5 struction illustrated in Fig. 1, and Fig. 3 is a detail view of the pawl thereof.

The base-piece 1 has a transverse extension or flange 2, arranged to overhang and interlock with the sash 3 or other support upon 3 which said base-piece is mounted. Pivotally mounted upon said base-piece is a pawl 4 of slightly-greater length than the distance from its fulcrum to the surface against which it is designed to abut.

In the construction illustrated in Figs. 1, 2, and 3 the base-piece 1 is a metal sheet having its end 2 flanged or turned out at right angles thereto in one direction and having its sides 5 turned up at right angles thereto in the op- 4 posite direction. The struck-up sides 5 have corresponding series of holes 6 therethrough, which are of proper size to receive the pintles 7 of the pawl. The pawl l in this construction is a single U-shaped piece of metal having outwardly-extending flanges 7 at its endniost portions. Said flanges are arranged in alinement with each other to constitute pintles and are of proper size to fit into the holes provided therefor in the raised sides of the base-plate.

The middle portion 8 of the piece which con- 5 stitutes the pawl that is, the portion which constitutes the end or abutting surface of the pawl has preferably a knurled curved surface. This curve may be a circular are; but it is desirable to have the radius of curvature increase from the edge of the pawl nearest to the retaining-flange of the base-plate, so as to constitute a cam.

The operation of the construction above'described is as follows: The pawl is inserted in the desired pair of holes provided therefor in the base-plate by pressing the ends of the arms together and springing the pintles into said holes. In like manner the pawl may be changed from one pair of holes to another. 5 The device is then laid on top of the lower sash. As illustrated in Fig. l, the retainingflange overhangs the rear face of the lower sash 3, in which case the pawl cooperates with the face of the upper sash 9. Obviously, 7 however, as illustrated in Fig. at, the device may be mounted with retaining-flange overhanging the end of the lower sash, in which case the pawl cooperates with the windowframe 10. In either case the lower sash is free to move downwardly; but its upward movement is prevented by the pawl. \Vhen upward pressure is applied to the lower sash, there is a considerable horizontal component of said force, which causes said sash to press forcibly against its guide or against the opposite side of the window-frame, as the case may be. In either case the friction is sufiicient to bind said sash against upward movement. In order to raise the lower sash or to 5 render the lock inoperative, it is merely necessary to turn the pawl back into horizontal position.

The construction hereinbefore described may have screw-holes 14 or other suitable 9 provision for mounting them permanently upon their sashes or other supports. However, as the end flange takes up all of the horizontal stress or force which is applied endwise of the pawl the device is self-retaining, and there is little or no occasion for fastening it to its support.

The device hereinbefore described is sim- 2. A sash-lock comprisinga base-plate having a downwardly-extending transverse flange at its forward end and upwardly-extending longitudinal flanges at its sides, each of said longitudinal flanges being provided witha series of holes, and a pawl provided with pivots adapted to engage any pair of opposite holes of the said'series.

Signed at St. Louis, Missouri, this 8th day of June, 1903.

JAMES M. BUTCHER.

Witnesses:

JAMES A. CARR, J. B. MEGOWN. 

